package org.yanghaokun.pay.utils;

import com.alipay.api.AlipayClient;
import com.alipay.api.DefaultAlipayClient;
import com.alipay.api.request.AlipayTradePagePayRequest;
import org.yanghaokun.pay.constants.AlipayConfig;
import org.yanghaokun.pay.domain.AlipayInfo;
import org.yanghaokun.pay.domain.PayBill;

/**
 * 支付宝支付工具类
 *    发起支付请求
 *    我们需要商家的支付宝支付信息才能拉起支付请求，还需要支付订单才能知道是哪一个订单的支付
 */
public class AlipayUtils {

    /**
     *
     * @param info 给哪个商家支付
     * @param bill  支付单
     * @return 支付请求数据包
     */
    public static String pay(AlipayInfo info, PayBill bill) {
        try {
            //获得初始化的AlipayClient
            AlipayClient alipayClient = new DefaultAlipayClient(AlipayConfig.gatewayUrl, info.getAppid(), info.getMerchant_private_key(), "json", AlipayConfig.charset, info.getAlipay_public_key(), AlipayConfig.sign_type);

            //设置请求参数
            AlipayTradePagePayRequest alipayRequest = new AlipayTradePagePayRequest();
            alipayRequest.setReturnUrl(AlipayConfig.return_url);
            alipayRequest.setNotifyUrl(AlipayConfig.notify_url);

            //商户订单号，商户网站订单系统中唯一订单号，必填
            String out_trade_no = bill.getUnionPaySn();
            //付款金额，必填
            String total_amount = bill.getMoney().toString();
            //订单名称，必填
            String subject = bill.getDigest();
            //商品描述，可空
            String body = bill.getDigest();

            alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
                    + "\"total_amount\":\""+ total_amount +"\","
                    + "\"subject\":\""+ subject +"\","
                    + "\"body\":\""+ body +"\","
                    + "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");

            //若想给BizContent增加其他可选请求参数，以增加自定义超时时间参数timeout_express来举例说明
            //alipayRequest.setBizContent("{\"out_trade_no\":\""+ out_trade_no +"\","
            //		+ "\"total_amount\":\""+ total_amount +"\","
            //		+ "\"subject\":\""+ subject +"\","
            //		+ "\"body\":\""+ body +"\","
            //		+ "\"timeout_express\":\"10m\","
            //		+ "\"product_code\":\"FAST_INSTANT_TRADE_PAY\"}");
            //请求参数可查阅【电脑网站支付的API文档-alipay.trade.page.pay-请求参数】章节

            //请求
            String result = alipayClient.pageExecute(alipayRequest).getBody();
            return result;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}
